Machine-tool-operating mechanism.



No. 890,211. PATENTED JUNE 9, 1908.

. s. 11. BULLARD. 11110111111: TOOL OPERATING MECHANISM.

APPLICATION FILED JULY 3. 1907.

4 SHEETS-SHEET 1.

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' S. H. BULLARD. MACHINE TOOL OPERATING MECHANISM. APPLICATION FILED JULY3, 1907.

4 SHEETS-SHEET 2.

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APPLICATION FILED JULY 3, 1907.

4 SHEETSSHEET 3.

J7me]; or .STanYeyHBUJZQTQ UNITED STATES PATENT oEEIoE- STANLEY H. BULL'ARD, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE BULLARD MACHINE TOOL COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

Specification of Letters Patent.

Patented J 11119 9, 1908.

Application filed m a, 1907. Serial No. 382,103.

To all whom it may concern:

Be it known that I, STANLEY H. BULLARD, a citizen of the United States, and resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Im rovements in Machine- Too1-Operating Mec anism, of which the following is a specification.

This invention relates to new and useful improvements in vertical turret lathes or like machines, and more particularly to mechanism for operating such machines.

Machines of the class to which my invention belongs comprise in part a rotary work carrying table, adjustable tool heads to operate upon the stock carriedby the work holder, means for driving the table and feeding the heads across the Work, and to two sets of changeable speed mechanisms for operating the table, one set otwhich may represent a sub-division of the first.

The particular machine .to which I have herein shown my invention applied also includes improved mechanism for conveniently changing the s ced of rotation of the table, and means for ceding the heads in the performance of their work in a simple and practical manner, and it also embodies brake mechanism whereby the rotation of the table may be quickly and effectively stopped. It further includes means for preventing the setting of the brake while either of the first or main sets of clutches are in engagement with the main driving shaft, thus avoiding any possible injury to work, or machine.

It is therefore the object of my invention to provide means in connection with the clutch gears and brake mechanism of a machine of the above class, whereby it may readily be determined which of the several speeds are in engagement; to provide means for determining the relative positions of the two speed mechanisms, and to clearly show the operatorthe direction to operate the reective mechanisms to obtain certain desired 0 anges of speeds, and finall to lprovide means whereby the brake may be he din its locked'position.

Upon the accompanyin three sheets of drawings forming a art 0 this specification similar characters of reference denote like or correspondin parts throughout the several figures and 0? which,

Figure 1, shows a-rear side perspective of an im roved type of vertical turret lathe embo ying my improvements. Fig. 2, is an enlarged side elevation of the lower portion of the lathe shown in Fig. 1, and illustrating my improved connections for operating the clutches and brake. Fig. 3, is a sectional elevation of the forward end of the operating shafts and attached disks shown in the preceding figures. Fig. 4, is a detail of a sleeve mounted upon the 0 rating shaft 25, shown in'Figs. 1 and 2. 5, is a sectional plan view of the mechanism shown in Fig. 2, and Fig. 6, is a detail longitudinal sectional view of the adjustable clutch mechanism shown in dotted lines in Fig. 5. Fig. 7, is an enlarged vertical sectional view of the changeable gears and brake mechanism thr which the machine is operated. Fi 8, is a cross sectional elevation taken on line 8, of Fig. 7, showing the brake mechanism. 9, is a similar sectional elevation on line 9 throu h one of the clutchgears shown in Fig. 7.

Referring in detail to the characters of reference marked upon the drawings 10 indicatesthe bed of a vertical turret lathe and 11 a motor by means of which the machine is driven, and adapted to be connected with a belt pulley 12 upon a transverse shaft 13. The shaft 13 is connected to a series of gears meshing with a series of clutch gears 14 inclosed within a case 29 and mounted upon a lower shaft 15. 'Said lower shaft is connected by beveled gears 16 with a shaft 18 bearing a series of gears 17 inclosed within the box 19. This series of gears connect with a series of clutch gears 20 u na shaft 21 which in turn is connected y beveled pinions '22 with a vertical shaft 23 that rotates the work carrying table 24.

From the foregoing it will be noted that from the continuously driven shaft 13 power is transmitted to the lower shaft 15 through any one of the series of clutch gears 14 of which I have shown five in the drawing and each obviously re resenting a different speed. This connection tlius serves to drive the shaft 15 at any one of five different speeds and by reason of the three clutch gears 20 within the box 19 any one of these five speeds may again be subdivided, so to speak, into three more speeds thus affording fifteen diiierent speeds by which the table 24 may be operated, the changes being obviously obtained 'by a rocking movement of the operating shafts 25 and 26 later to be again referred to of numbers, representing the fifteen changes A brake mechanism 27 located upon the lower shaft 15 within the gear case 29 is op erated by a rocking movement of the sleeve 30, mounted in the end of said case, and imparted by a swinging movement of the shaft 26. This brake comprises a disk 27 which is keyed to the shaft and supports a split ring 27 b that is provided intermediate its ends with a swinging lever 27 which is engaged and operated by the lug 27 of the rocker sleeve 30. Thus it will be apparent that as said sleeve is rocked the lug will engage the lever in a way to operate the split ring and frictionally engage the disk in a manner to brake the same and retard the movement of the shaft.

The shaft 25 is journaled in a bracket 31 that is secured to the outer end of the up )er shaft 13 and connected by means of beveled pinions 32 with a cross shaft 33 which bears a .pinion 34 for operating the slide rack 35 to shift the clutch mechanism to engage either of the three clutch gears 20 mounted upon the shaft 21. The forward end of this shaft 25 is journaled in an arm 36 adjust-ably mounted in a bracket 36 attached to the side of the machine bed. Secured upon said shaft at one side of the bracket is a special sleeve 37 having lateral slots 38 therein for a pur )ose later to be explained.

T ie bracket 36 before mentioned, is provided with an elongated slot 42 in which the lower end of the intermediate portion of the shaft 26 normally rests, and which permits of the raising of said shaft to the upper position, shown dotted in Fig. 2, for the purpose of turning the sleeve 30 to set the brake. To the shaft 26 is secured an arm 43 which also contains an elongated slot 44 through which the before mentioned shaft 25 operates, and to permit of the raising of the lower shaft as indicated by dotted hnes to set the brake. To the forward face of the upper end of arm 43 is secured a finger 45 to engage one of the radial pockets 38 of the sleeve 37, for the purpose of holding the u iper shaft 25 against rocking movement whi e the lower shaft is in its normal position and set to cause the engagement of one of its clutches. Upon the outer end of the shaft 26 I provide an operating wheel 46 having aseries of five radial handles, the number of which may correspond with that of the number of changes of sIpeeds provided for within the gear box 29. he opposite end of the shaft 26 carries a pinion 47 which engages a rack 48 whereby either of the clutch gears may be engaged by the rocking movement of said wheel 46 to effect the particular speed desired.

On the outer end of the shaft 25 is a novel construction of indicator in the form of a disk 39 provided with a handle 40 and hav-- of speeds obtainable by the gears on shafts 15 and 21 within the gear boxes.

My means for holding the shaft 26 in its raised osition as indicated in dotted lines Fig. 2, or the purpose of retaining the brake in engagement, comprises a sleeve 49 having a series of pockets 50 therein which when the shaft is raised serves to engage the s ring actuated holding pin 51 projecting om the forward side of the bracket 36, in a way to frictionally hold said shaft 26 in its upper position when manually raised to that elevation and likewise ermits the shaft to, be readily lowered by t 1e same means when it is desired to release the brake.

Adjoining the sleeve 49 upon the shaft 26 I provide a number bearing means consistin of special disk 52 having a series of five radiapoc ets 53 therein which permit of the raismg of the said shaft 26 as indicated in dotted lines, when said shaft is in a position to not engage either of the clutches. The engagement of the outer ends of the arm portions of the disk intermediate the pockets, with the underside of the upper shaft 25 positively prevents said lower shaft from bemg raised when the clutches are in engagement. Two of the ad'oining arms of the disks are provided with extensions 54 which form stops to limit the rota movement ofsaid disk, its shaft and the s ide of rack within the clutch gears by reason of the engagement of such stops with the sides of the upper shaft 25. Upon the face of these radial arm like ortions of the disk I arrange five series, of t 1168 numbers each, which are designed to be read through the pockets 41 in the upper or overlapping disk 39 and in conjunction with the arrows designated as a, b and c at the side of the respective pockets. Thus indicating to an operator what clutches are in enga ement and their relation to each other, and likewise what chan es of speeds of the table are to be had, and t e directions necessary to rotate the shafts to obtain such results. As for in stanee'as indicated in Fig. 3, intermediate the arrows c, is the number 26, which represents that the table will be 0 erated 26 revolutions er minute, while if eit er of the other numliers 18, 22, 32 and 39 were similarly located, it would indicate that the clutch in the gear case 29 corresponding with either of said numbers was in enga ement and that a speed corresponding with said number would be obtained. The rocking movement of the upper disk and its connections by means of the handle 40 to bring, either of the upper pockets (1 or b, to the ower. position, would necessitate the reading of the outer or intermediate set of numbers upon the arms of the lower disk, thus indicating other speeds of rotation and fractions thereof in a way to clearly demonstrate any speed, by which the machine can be operated.

What I claim is 1. The combination of a series of clutches, a brake, a shaft for operating .both -the clutches and brake and means for holding said shaft in a position to engage the brake.

2. The combination of a series of clutches, a brake connected therewith, a shaft adapted to be rotated to engage the clutches and to swing to 'set the brake, and means for holding said shaft in a position to lock the brake.

3. The combination of a series of clutches, a brake connected therewith, a shaft adapted to be rotated to engage the clutches and to swing to set the brake, and a s ring actuated pin to engage the shaft and hol d it in position to-loek thebrake.

4. The combination with two sets of gears for driving a machine, of separate shafts for operating each set of gears, number bearing means carried by one shaft thereon, and an indicator carried by the other shaft to be operated and read in connection with the number bearing means.

5. The combination with two sets of gears for driving a machine, of separate shafts for operating each set of gears, number bearing means carried by one shaft thereon, and an indicator carried by the other shaft to be operated and read in connection with the number bearin means, and means for operating the two 3 afts.

6. The combination with two sets of gears for driving a machine, of separate shafts for operating each set of gears, a disk having numbers thereon carried by one shaft, and an indicator disk carried by the other shaft, having pockets therein to register with the numbers upon the first named disk.

7. The combination with two sets of gears for driving a machine, of separate rota shafts for operating, each set of gears, a dis bearing a series of numbers mounted upon one shaft, and a pocketed disk carried by the other shaft, and overlapping the first named disk in a way to insure the registration of the numbers and pockets when the shafts and disks are rotated.

8. The combination with two sets of gears for driving a machine, of separate rotary shafts for operating each set of gears, a pocketed disk carried by one shaft, and a second disk carried by the other shaft, bearing a series of numbers thereon so placed to repre sent the engagement of one of the clutches when registering-with a pocket of the before mentioned pocketed disk. I

v 9. The combination with two sets of gears for driving a maehine,'of separate shafts for operating each set .of gears, a disk carried by one shaft having several series of numbers thereon, and an indicating disk carried by the other shaft andcontaining an indicating point thereon for each series of numbers upon o the first named disk.

10. The combination with two sets of gears for driving a machine, of se arate rota shafts for operating each set 0 gears, a disk carried on one shaft bearing several series of numbers upon its face arranged at specified distances from the center of the disk,'*-a disk upon the second shaft overlap ing the first named disk and having radia pockets arranged in its peripheral ed e through which the numbers in the lower isk ma be read, an indicating arrow upon the disk beside each pocket and each arran y distance from the center dis and adapted to register withthe'difierent series of numbers upon the first mentioned disk.

Si ned at Bridgeport, in the county of Fai old, and State of Gennecticut, this 26th day of June, A. D. 1907.

' STANLEY H. BULLARD.

Witnesses: V

C. M. NEWMAN, RUTH Ramorm.

ed at a different 

